<ac-layer acFor="let entity of entities$" [context]="this" [show]="show">
  <ac-billboard-desc props="{
        image : entity.image,
        position: entity.position,
        color: Cesium.Color.PURPLE,
        scale: 0.3,
     }">
  </ac-billboard-desc>
  <ac-billboard-desc props="{
        show: entity.selected,
        image : selectionImage,
        position: entity.position,
        scale: 0.2,
     }">
  </ac-billboard-desc>
</ac-layer>
